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A239069
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Decimal expansion of gamma - Ei(-1).
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7
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7, 9, 6, 5, 9, 9, 5, 9, 9, 2, 9, 7, 0, 5, 3, 1, 3, 4, 2, 8, 3, 6, 7, 5, 8, 6, 5, 5, 4, 2, 5, 2, 4, 0, 8, 0, 0, 7, 3, 2, 0, 6, 6, 2, 9, 3, 4, 6, 8, 3, 1, 8, 0, 6, 3, 8, 3, 7, 4, 5, 8, 4, 7, 9, 5, 8, 4, 3, 6, 4, 2, 5, 3, 3, 6, 8, 0, 6, 2, 1, 5, 6, 5, 9, 1, 5, 7, 3, 1, 4, 3, 2, 6, 8, 8, 3, 9, 9, 9, 4
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OFFSET
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0,1
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COMMENTS
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See crossrefs sequences for other comments, references, links, and formulas.
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LINKS
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FORMULA
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Equals (the Euler-Mascheroni constant) - (the exponential integral at -1) = A001620 + A099285.
Equals Sum_{n>=1} (-1)^(n-1) / A001563(n) = Sum_{n>=1} (-1)^(n-1) / (n*n!).
Equals -Integral_{x=0..1} log(x)/exp(x) dx. - Amiram Eldar, Aug 01 2020
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EXAMPLE
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0.7965995992970531342836758655425240800732066293468...
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MATHEMATICA
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RealDigits[EulerGamma - ExpIntegralEi[-1], 10, 100][[1]]
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PROG
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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